| 完形填空 | |||
| The Japanese Macaca monkey has been studied in the wild for over 50 years. In 1952 ,on one small Japanese island,scientists dropped some 1 dirt for the monkeys. The monkeys liked their taste,but they found the dirt 2 . One clever 18-month-old monkey 3 the problem by washing the sweet potatoes in a nearby river. She taught this to her mother. Her 4 also learned this new way and they taught their mothers too. All the younger monkeys 5 learned to wash the dirty sweet potatoes to make them 6 to eat. But many found it very hard to learn this and still ate the 7 sweet potatoes. Then something 8 .In the autumn of 1958,scientists found that the monkeys on other nearby 9 began washing their sweet potatoes too. Scientists still don't fully understand how this knowledge was 10 from one island to another. |
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( )1.A. sweet potatoes |
B. green plants B. terrible B. reach B. brothers B. easily B. smaller B. large B. took off B. islands B. dropped |
C. hard stones C. difficult C. solve C. sisters C. angrily C. lighter C. new C. took place C. beaches C. passed |
D. fresh nuts |